Experimental Study of Maintenance and Treatment of R.C.C. Building by Fiber Reinforced Plastic

Fiber Reinforced Polymer FRP as an external reinforcement is used extensively to deal with the strength requirements related to flexure and shear in structural systems. But the strengthening of members subjected to torsion is explored only recently. Torsion failure is an undesirable brittle form of failure which should be avoided specially in the earthquake prone areas. In the present work, the behavior and performance of rectangular reinforced concrete beams strengthened with externally bonded Fiber Reinforced Polymer FRP fabrics subjected to combined flexure and torsion is studied experimentally. Three sets of concrete cylinders were tested for their ultimate strengths. In SET I three concrete cylindersF1 Without wrap FRP, F2 Single wrap FRP, F3 Double wrap FRP F1, F2 and F3 are tested. In SET II three concrete cylinders S1Without wrap FRP, S2 Single wrap FRP, S3 Double wrap FRP S1, S2 and S3 are tested. In SETIII three concrete cylinders R1 Without wrap FRP, R2 Single wrap FRP, R3 Double wrap FRP R1, R2 and R3 are tested. The concrete cylinders F1, S1 and R1 were taken as the control concrete cylinders. Abdul Quadir Khan | Dr. Shubha Agrawal "Experimental Study of Maintenance and Treatment of R.C.C. Building by Fiber Reinforced Plastic" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-6 , October 2021, URL: https://www.ijtsrd.com/papers/ijtsrd46365.pdf Paper URL : https://www.ijtsrd.com/engineering/civil-engineering/46365/experimental-study-of-maintenance-and-treatment-of-rcc-building-by-fiber-reinforced-plastic/abdul-quadir-khan

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concrete FRP Fiber Reinforced Polymer Reinforced Polymer FRP wrap FRP strength

International Journal of Trend in Scientific Research and Development (IJTSRD) 
Volume 5 Issue 6, September-October 2021 Available Online: www.ijtsrd.com e-ISSN: 2456 – 6470 
 
@ IJTSRD   |   Unique Paper ID – IJTSRD46365   |   Volume – 5   |   Issue – 6   |   Sep-Oct 2021 
Page 67 
Experimental Study of Maintenance and Treatment of 
R.C.C. Building by Fiber Reinforced Plastic 
Abdul Quadir Khan1, Dr. Shubha Agrawal2 
1Research Scholar, 2Associate Professor, 
1,2Department of Civil Engineering, Lakshmi Narain College of Technology, Bhopal, Madhya Pradesh, India 
 
ABSTRACT 
Fiber Reinforced Polymer (FRP) as an external reinforcement is used 
extensively to deal with the strength requirements related to flexure 
and shear in structural systems. But the strengthening of members 
subjected to torsion is explored only recently. Torsion failure is an 
undesirable brittle form of failure which should be avoided specially 
in the earthquake prone areas. In the present work, the behavior and 
performance of rectangular reinforced concrete beams strengthened 
with externally bonded Fiber Reinforced Polymer (FRP) fabrics 
subjected to combined flexure and torsion is studied experimentally. 
Three sets of concrete cylinders were tested for their ultimate 
strengths. In SET I three concrete cylindersF1 Without wrap FRP, F2 
Single wrap FRP, F3 Double wrap FRP (F1, F2 and F3) are tested. In 
SET II three concrete cylinders S1Without wrap FRP, S2 Single wrap 
FRP, S3 Double wrap FRP (S1, S2 and S3) are tested. In SETIII 
three concrete cylinders R1 Without wrap FRP, R2 Single wrap FRP, 
R3 Double wrap FRP (R1, R2 and R3) are tested. The concrete 
cylinders F1, S1 and R1 were taken as the control concrete cylinders. 
 
 
KEYWORDS: Fiber Reinforced, Polymer, flexure, concrete, beams, 
shear, compared 
 
 
 
How to cite this paper: Abdul Quadir 
Khan 
| 
Dr. 
Shubha Agrawal 
"Experimental Study of Maintenance 
and Treatment of R.C.C. Building by 
Fiber 
Reinforced 
Plastic" Published in 
International Journal 
of 
Trend 
in 
Scientific Research 
and Development 
(ijtsrd), ISSN: 2456-
6470, Volume-5 | 
Issue-6, October 2021, pp.67-70, URL: 
www.ijtsrd.com/papers/ijtsrd46365.pdf 
 
Copyright © 2021 by author (s) and 
International Journal of Trend in 
Scientific Research and Development 
Journal. This is an 
Open Access article 
distributed under the 
terms of 
the Creative Commons 
Attribution License (CC BY 4.0) 
(http://creativecommons.org/licenses/by/4.0) 
 
INTRODUCTION 
1. Previously, the retrofitting of reinforced concrete 
structures, such as columns, beams and other 
structural elements, was done by removing and 
replacing the low quality or damaged concrete 
or/and steel reinforcements with new and stronger 
material. However, with the introduction of new 
advanced composite materials such as fiber 
reinforced polymer (FRP) composites, concrete 
members can now be easily and effectively 
strengthened using externally bonded FRP 
composites. 
2. Retrofitting of concrete structures with wrapping 
FRP sheets provide a more economical and 
technically superior alternative to the traditional 
techniques in many situations because it offers 
high strength, low weight, corrosion resistance, 
high fatigue resistance, easy and rapid installation 
and minimal change in structural geometry. In 
addition, FRP manufacturing offers a unique 
opportunity for the development of shapes and  
forms that would be difficult or impossible with  
 
the conventional steel materials. Although the 
fibers and resins used in FRP systems are 
relatively expensive compared with traditional 
strengthening materials, labour and equipment 
costs to install FRP systems are often lower. FRP 
systems can also be used in areas with limited 
access where traditional techniques would be 
impractical. 
3. Several investigators took up concrete beams and 
columns retrofitted with carbon fiber reinforced 
polymer (CFRP) glass fiber reinforced polymer 
(GFRP) composites in order to study the 
enhancement of strength and ductility, durability, 
effect of confinement, preparation of design 
guidelines and experimental investigations of 
these members. The results obtained from 
different investigations regarding enhancement in 
basic parameters like strength/stiffness, ductility 
and durability of structural members retrofitted 
with externally bonded FRP composites, though 
quite encouraging, still suffers from many 
 
 
IJTSRD46365 
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@ IJTSRD   |   Unique Paper ID – IJTSRD46365   |   Volume – 5   |   Issue – 6   |   Sep-Oct 2021 
Page 68 
limitations. This needs further study in order to 
arrive at recognizing FRP composites as a 
potential full proof structural additive. FRP repair 
is a simple way to increase both the strength and 
design life of a structure. Because of its high 
strength to weight ratio and resistance to 
corrosion, this repair method is ideal for 
deteriorated concrete structure. 
1. Additional strength may be needed to allow for 
higher loads to be placed on the structure. This is 
often required when the use of the structure 
changes and a higher load- carrying capacity is 
needed. This can also occur if additional 
mechanical equipment, filing systems, planters, or 
other items are being added to a structure. 
2. Strengthening may be needed to allow the 
structure to resist loads that were not anticipated 
in the original design. This may be encountered 
when structural strengthening is required for loads 
resulting from wind and seismic forces or to 
improve resistance to blast loading. Additional 
strength may be needed due to a deficiency in the 
structure's ability to carry the original design 
loads. 
3. Deficiencies may be the result of deterioration 
(e.g., corrosion of steel reinforcement and loss of 
concrete section), structural damage (e.g., 
vehicular impact, excessive wear, 
MATERIALS AND METHODS 
 
Typical properties of Carbon Fiber  
Results for M-20 grade of concrete in Case -I 
Sr. 
No. 
Grade of 
Concrete 
Cylinder 
Status 
Breaking Load 
(MT) 
Strength 
Kg/cm2 
Remark 
1. 
M-20 
Without warp 
45.75 
259 
Initial stage 
2. 
M-20 
Single warp 
65.45 
370.55 
Increased by 43% from initial stage 
3. 
M-20 
Double warp 
87 
492.56 
Increased by 33% from single warp 
 
 
 
 
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Combined result for breaking load on grades case-I 
 
 CONCLUSION 
In this thesis we have chosen some buildings 
described in four cases in BHEL area which has been 
damaged due to soil settlement. In this study we have 
taken some of the columns as shown in figures of 
damaged building. This experimental study consists 
of casting of three sets of reinforced concrete (RC) 
cylinders of size 150mm diameter and 300mm height. 
In SET I three cylinders of M-15 grade of concrete 
were casted, out of which one is unreinforced and 
other two were strengthened using continuous fiber 
reinforced polymer (FRP) sheets. In SET II three 
cylinders of M-20 grade of concrete weak in shear 
were casted, out of which one is the unreinforced and 
other two were strengthened by using continuous 
fiber reinforced polymer (FRP) sheets in shear. In 
SET III three cylinders of M-25 grade of concrete 
weak in shear were casted, out of which one is the 
unreinforced and other two were strengthened by 
using continuous fiber reinforced polymer (FRP) 
sheets in shear. The strengthening of the cylinder is 
done with varying configuration and layers of FRP 
sheets. Experimental data on load and failure modes 
of each of the cylinder were obtained. The change in 
load carrying capacity and failure mode of the 
cylinder are investigated as the amount and 
configuration of FRP sheets are altered. 
Results 
After applying all the required tests we calculate the 
strength of concrete grade and conclude overall result 
of this exercise. 
Results for M-15 concrete grade cylinders- 
Firstly we have checked the strength of normal 
concrete cylinder without FRP warp which is taken 
out for all four cases average value of compressive 
strength is 199.35 Kg/cm2. After that we applied FRP 
on concrete cylinder with single warp and strength 
was tested which is taken out for all four cases 
average value of compressive strength are 318.51 
Kg/cm2 increased by 59.7% from initial stage. Now 
after testing FRP on concrete with single warp we 
applied double warp of FRP on concrete for testing 
the strength of cylinder and we get the strength for all 
four cases average value of compressive strength are 
429.25 Kg/cm2 which is increased by 34.76% from 
single warp and 115% from initial stage. 
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